In the modern study of Hilbert space operators there has been an increasingly subtle involvement with analytic function theory. This is evident in the analysis of subnormal operators, Toeplitz operators and Hankel operators, for example. On the other hand the operator theoretic viewpoint of interpolation by analytic functions is a powerful one. There has been significant activity in recent years, within these enriching interactions, and the time seemed right for an overview ot the main lines of development. The Advanced Study Institute 'Operators and Function Theory' in Lancaster, 1984, was devoted to this, and this book contains ex panded versions (and one contraction) of the main lecture prog ramme. These varied articles, by prominent researchers, include, for example, a survey of recent results on subnormal operators, recent work of Soviet mathematicians on Hankel and Toeplitz operators, expositions of the decomposition theory and inter polation theory for Bergman, Besov and Bloch spaces, with applic ations for special operators, the Krein space approach to inter polation problems, •• and much more. It is hoped that these proceedings will bring all this lively mathematics to a wider audience. Sincere thanks are due to the Scientific Committee of the North Atlantic Treaty Organisation for the generous support that made the institute possible, and to the London Mathematical Society and the British Council for important additional support. Warm thanks also go to Barry Johnson and the L.M.S. for early guidance, and to my colleague Graham Jameson for much organisational support.
This book covers Toeplitz operators, Hankel operators, and composition operators on both the Bergman space and the Hardy space.
Although much of the material on operators is quite recent, this book is not intended to be an exhaustive survey. It is, quite simply, an invitation to join in the fun. The story goes something like this.
In the modern study of Hilbert space operators there has been an increasingly subtle involvement with analytic function theory. This is evident in the analysis of subnormal operators, Toeplitz operators and Hankel operators, for example.
Concise treatment focuses on theory of shift operators, Toeplitz operators and Hardy classes of vector- and operator-valued functions.
Positivity of a matrix is as natural as positivity of mass in statics or positivity of a probability distribution. It is a notion which has attracted the attention of many great minds. Yet, after at least two centuries of research, ...
We next define the Bergman spaces of the unit disk. More complete discussions of the Bergman spaces may be found in the paper of S. Axler [Ax88] or the book of K. Zhu [Zh90b). DEFINITION 2.4 For 0 < p < co the Bergman space AP(D) is the ...
The Clarendon Press, Oxford University Press, New York, 1985. Oxford Science Publications. 47.M. Rosenblum and J. Rovnyak. Topics in Hardy classes and univalent functions. Birkhäuser Advanced Texts: Basler Lehrbücher.
The volume contains selected papers of the Spectral Function Theory seminar, Leningrad Branch of Steklov Mathematical Institute.
Conference on Recent Advances in Operator-Related Function Theory, Trinity College, Dublin, Ireland, August 4-6, ... M. D. Kruskal, and A. Macintyre, Editors, Analyzable functions and applications, 2005 José Burillo, Sean Cleary, ...
Applications of Functional Analysis and Operator Theory